Sakashima's Student, and Wispweaver Angel

Prerequisites

• Sakashima's Student in hand
• Wispweaver Angel on the battlefield

Steps

1. Cast Sakashima's Student by paying its mana cost, choosing to have it enter the battlefield as a copy of Wispweaver Angel When Sakashima's Student enters the battlefield, it triggers, blinking Wispweaver Angel
2. When Wispweaver Angel enters the battlefield, it triggers, blinking Sakashima's Student
3. Choose to have Sakashima's Student enter the battlefield as a copy of Wispweaver Angel
4. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB